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Forum topic by KPW posted 12-01-2011 11:11 PM 2395 views 0 times favorited 12 replies Add to Favorites Watch
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KPW

226 posts in 1836 days


12-01-2011 11:11 PM

Topic tags/keywords: bandsaw question

I recently bought a 14” band saw labled pioneer. Am trying to upgrade it to multi speed. Can anyone advise me on the step pulley I should put on the motor to get the most usable speeds for resawing? The lower wheel has a 6” pulley on it.

-- Ken --------- never try and put 5 lbs. of tenon in a 3 lb. mortise.


12 replies so far

View Loren's profile (online now)

Loren

8315 posts in 3115 days


#1 posted 12-01-2011 11:45 PM

One speed is fine for all wood cutting with a 14” band saw. Multi-speed
is usually for metal, plastics and stuff like that.

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Bill White

4459 posts in 3428 days


#2 posted 12-01-2011 11:52 PM

I don’t have stepped pulleys on my BS. What are ya tryin’ to do with the saw? Got any pics?
Bill

-- bill@magraphics.us

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KPW

226 posts in 1836 days


#3 posted 12-01-2011 11:58 PM

I guess I thought that resawing would need a slower speed. So what is the recommended speed I should be running at?

-- Ken --------- never try and put 5 lbs. of tenon in a 3 lb. mortise.

View jtbinvalrico's profile

jtbinvalrico

36 posts in 1838 days


#4 posted 12-02-2011 12:15 AM

Can you post an image of the saw? I’m assuming you have a saw mounted on a stand, with a shaft exiting the lower body of the bandsaw, and a motor under or beside that. Generally, your bandsaw’s speed is determined by a few factors: Motor rpm, pulley size at the motor shaft, pulley size at the lower wheel input shaft, and a fixed factor: the size of the bandsaw upper and lower wheels.

The easiest way to vary speed in such a setup is to use stepped pulleys, much like you might see at the top of a drill press, or here, on a lathe:

Some pics of your bandsaw, please, and the measurements of the bandsaw wheels…..then we can figure the pulley sizes you need to get the speeds you are looking for.

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KPW

226 posts in 1836 days


#5 posted 12-02-2011 12:30 AM

Thanks JT I’ll post some pics tommorow. Should I be using different speeds for different woodsawing tasks?

-- Ken --------- never try and put 5 lbs. of tenon in a 3 lb. mortise.

View Elizabeth's profile

Elizabeth

814 posts in 2611 days


#6 posted 12-02-2011 12:47 AM

My newbie-ish understanding is that the saw itself always runs at the same speed for woodsawing but you would adjust your feed rate (and blade type) depending on the thickness and density of the wood.

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jtbinvalrico

36 posts in 1838 days


#7 posted 12-02-2011 01:12 AM

....Elizabeth is correct about feed rate and blade type being the key variables you can control. I sometimes cut plastics on mine, where a variable speed can be nice. If all the OP is doing is re-sawing, the given speed should be fine….but if he’s dabbling in different materials or pushing some envelopes, speed settings could be the ticket.

That said….I do recommend keeping metal and wood separate when it comes to the bandsaw.

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KPW

226 posts in 1836 days


#8 posted 12-02-2011 03:02 AM

Thanks to all. I’m so glade I joined this site.

-- Ken --------- never try and put 5 lbs. of tenon in a 3 lb. mortise.

View IrreverentJack's profile

IrreverentJack

724 posts in 2311 days


#9 posted 12-02-2011 09:21 PM

KPW, Looks like a Delta clone . I recommend getting an Iturra Design Catalog. No website, you have to call them 904-642-2802. I guess Luis Iturra doesn’t believe in the internet. This is a 240+page catalog for/about the Delta 14” bandsaw and it’s clones. The catalog explains when and why you would want a higher speed and sells high speed and variable speed pulley sets. You can throw a lot of money into useless (or less than useless) modifications if you’re not careful. Louis Iturra’s catalog explains and compares the products and what to expect from them. -Jack

View KPW's profile

KPW

226 posts in 1836 days


#10 posted 12-02-2011 09:26 PM

So I have a 1740RPM motor,14” wheel,6” drive pulley,and a 2-1/2” motor pulley. Can anyone tell me the blade speed?

-- Ken --------- never try and put 5 lbs. of tenon in a 3 lb. mortise.

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IrreverentJack

724 posts in 2311 days


#11 posted 12-02-2011 10:56 PM

I’m too lazy to do the math and my kids aren’t home now. The specs for this Pioneer 14 inch Deluxe Band Saw says the blade speed is 3000sfpm . -Jack

View jtbinvalrico's profile

jtbinvalrico

36 posts in 1838 days


#12 posted 12-03-2011 12:08 AM

Here’s a link to the calculator on Vintage Machines:

http://vintagemachinery.org/math/sfpm.aspx

You are presently running at 2633 sfpm…..pretty normal speed.

You can play with the two pulley sizes and get where you want to go….....problem is, you don’t need to go faster. If anything, you may want to go way slower. So how do you get down to something like 1500 sfpm?

Let’s just kick it around for fun. You would need a 2” motor pulley and an 8” driven pulley to get 1580 sfpm. If you absolutely had to do this, you could add the pulleys to your present configuration, provided there’s room on the shafts. You would have a 2.5” and 2” pulley next to each other on the motor shaft, and 6” and 8” pulleys next to each other on the input shaft. Hinge the motor base and speed swaps are as easy as lifting the motor enough to clear the belt change from one to the other.

The real issue here is cost. Just the 8” pulley new is going to run $50. You could end up with $75 into this conversion by the time you are done….is it worth it? If you are not in a hurry, you can keep and eye out for a bargain. Somewhere out there somebody is throwing out a machine that just happens to have an 8” pulley on it.

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